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Breaking 256-bit Elliptic Curve Encryption with a Quantum Computer
Feb. 9, 2022, 12:25 p.m. | Bruce Schneier
Schneier on Security www.schneier.com
Researchers have calculated the quantum computer size necessary to break 256-bit elliptic curve public-key cryptography:
Finally, we calculate the number of physical qubits required to break the 256-bit elliptic curve encryption of keys in the Bitcoin network within the small available time frame in which it would actually pose a threat to do so. It would require 317 × 106 physical qubits to break the encryption within one hour using the surface code, a code cycle time of 1 μ …
academic papers computer cryptography elliptic encryption ibm quantum quantum computing
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